德国acam-messelectronic有限公司推出的picostrain系列ps021芯片给电容测量带来了
革命性的提升.测量原理为时间数字转换,其测量有效精度可达21位,也就是说可分辨最低
6aF(10e-18F)的电容,测量频率最高可以达到50Khz,而且功耗非常低,最低电流消耗只有
10uA.芯片最多可以测量4路电容传感器.
而且最重要的特性是,ps021测量电容时,电容的测量范围几乎没有任何限制,可以从0 fF
一直到几百nF!!! 这种高测量灵活性可以使PS021应用在很多需要高精度电容测量的使用
当中.例如压差变送器,压力传感器,电容式位移传感器,加速度传感器等等.
PS021有两种测量模式,补偿模式和非补偿模式.应用补偿模式时通过德国公司的专利
算法,可以大大消除寄生电容,零点漂移以及温度对于电容测量的影响,在这种情况下温度
对于测量的影响小于10ppm.
芯片的封装形式为TQFN48和QFN48两种,工作温度范围在–40°C 到 +120°C,另外芯片
通过SPI串行口于单片机进行通信,芯片还集成了专门的温度测量端口,接温度传感器可
测量温度。电源核心电压从1.8V-3.6V,I/O电压从1.8V-5.5V。
有兴趣的朋友可以与我联系:
电话:021-54654355(赵欣)
Email:tony@acam-china.com
MSN:baggio1214@hotmail.com
资料下载请登陆:www.acam.de(点击右上角国旗进入中文介面)
上海宽创电子科技有限公司
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